Molecular Engineering and Morphology Control of Polythiophene:Nonfullerene Acceptor Blends for High‐Performance Solar Cells,Advanced Energy Materials

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Molecular Engineering and Morphology Control of Polythiophene:Nonfullerene Acceptor Blends for High‐Performance Solar Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-10-15 , DOI: 10.1002/aenm.202002572
Qi Wang _{1,

2} , Yunpeng Qin ₃ , Miaomiao Li _{1,

4} , Long Ye _{1,

4,

5} , Yanhou Geng _{1,

2,

4}

Affiliation

With the advances in organic photovoltaics (OPVs), the development of low‐cost and easily accessible polymer donors is of vital importance for OPV commercialization. Polythiophene (PT) and its derivatives stand out as the most promising members of the photovoltaic material family for commercial applications, owing to their low cost and high scalability of synthesis. In recent years, PTs, paired with nonfullerene acceptors, have progressed rapidly in photovoltaic performance. This Review gives an overview of the strategies in designing PTs for nonfullerene OPVs from the perspective of energy level modulation. A survey of the typical classes of nonfullerene acceptors designed for pairing with the benchmark PT, i.e., poly(3‐hexylthiophene) (P3HT) is also presented. Furthermore, recent achievements in understanding and controlling the film morphology for PT:nonfullerene blends are discussed in depth. In addition to the effects of molecular weight and blend ratio on film morphology, the crucial roles of miscibility between PT and nonfullerene and processing solvent in determining film microstructure and morphology are highlighted, followed by a discussion on thermal annealing and ternary active layers. Finally, the remaining questions and the prospects of the low‐cost PT:nonfullerene systems are outlined. It is hoped that this review can guide the optimization of PT:nonfullerene blends and advance their commercial applications.

中文翻译：

高性能太阳能电池用聚噻吩：非富勒烯受体共混物的分子工程和形态控制

随着有机光伏（OPV）的发展，低成本且易于获得的聚合物供体的开发对于OPV商业化至关重要。聚噻吩（PT）及其衍生物因其低成本和高合成规模而成为商业应用中最有希望的光伏材料家族成员。近年来，与非富勒烯受体配对的PT在光伏性能方面发展迅速。这篇综述从能量水平调节的角度概述了为非富勒烯OPV设计PT的策略。还介绍了设计用于与基准PT配对的非富勒烯受体典型类别的调查，即聚（3-己基噻吩）（P3HT）。此外，深入讨论了在理解和控制PT：nonfullerene共混物的膜形态方面的最新成就。除了分子量和混合比对薄膜形态的影响外，还着重介绍了PT与非富勒烯和加工溶剂之间的混溶性在确定薄膜的微观结构和形态方面的关键作用，随后讨论了热退火和三元活性层。最后，概述了低成本PT：nonfullerene系统的其余问题和前景。希望这篇综述可以指导PT：nonfullerene共混物的优化，并促进其商业应用。重点介绍了PT与非富勒烯与加工溶剂之间的可混溶性在确定膜的微观结构和形态方面的关键作用，随后讨论了热退火和三元活性层。最后，概述了低成本PT：nonfullerene系统的其余问题和前景。希望这篇综述可以指导PT：nonfullerene共混物的优化，并促进其商业应用。重点介绍了PT与非富勒烯与加工溶剂之间的可混溶性在确定膜的微观结构和形态方面的关键作用，随后讨论了热退火和三元活性层。最后，概述了低成本PT：nonfullerene系统的其余问题和前景。希望这篇综述可以指导PT：nonfullerene共混物的优化，并促进其商业应用。

更新日期：2020-12-01

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